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RF Coils: Signal Characteristics
(
)
2 2 4
2
2/3
2
0
a x
a I
B
+
=
π
π
µ
Distance
SNR
a
Theoretical cylinder coils
surface coils
Finite Element Modelling used for
complicated designs
Surface Coil:
Excellent SNR
close to coil
Poor uniformity
Body Coil:
Poor SNR
Excellent
uniformity